Platinum ethylene dimerization catalysts: Diphosphine vs. diimine ancillary ligand effects was written by Debnath, Suman;Basu, Sayanti;Schmidt, Bradley M.;Adams, Jeramie J.;Arulsamy, Navamoney;Roddick, Dean M.. And the article was included in Polyhedron in 2020.Product Details of 700-16-3 The following contents are mentioned in the article:
Kinetic and mechanistic studies are presented for the (dfepe)Pt(Me)(NC5F5)+ (dfepe = (C2F5)2PCH2CH2P(C2F5)2) ethylene dimerization catalyst system. New labile complexes (dfepe)PtMe(L)+ (L = NC5F5, C6F5CN, C6F5NH2, C6F5NO2) have been prepared A general extension to a variety of other chelating diphosphine analogs (PP)Pt(Me)(C2H4)+ has been accessed by Me abstraction from donor (PP)PtMe2 precursors with Ph3C+B(C6F5)–4 in the presence of ethylene to cleanly afford (PP)Pt(Me)(C2H4)+ products. Catalysis studies for these more electron-rich diphosphine systems demonstrate moderate dimerization activity which is uniformly higher than reported for (diimine)Pt(Me)(C2H4)+. In several cases allylic catalyst decomposition products (PP)Pt(η3-C3H4Me)+ have been identified. A DFT study of insertion barriers for diimine and diphosphine systems is presented which suggests that weakening of Pt-ethylene ground state binding by strong-field diphosphine ligands is a major contributing factor to the lower ethylene insertion barriers for PP systems. This study involved multiple reactions and reactants, such as 2,3,4,5,6-Perfluoropyridine (cas: 700-16-3Product Details of 700-16-3).
2,3,4,5,6-Perfluoropyridine (cas: 700-16-3) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Product Details of 700-16-3